Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c6b6b7cb753b41…

MALICIOUS

PDF

32.4 KB Created: 2020-08-14 04:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1640e635400dbb456767e1bbc983c61 SHA-1: 6c68aa64e3c6005c8f78b7b69a80545e2dd21c28 SHA-256: c7c6b6b7cb753b4126ffae1a39c2aab68ca4e0c53ae60e2daf40b7126ae16bb9
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure to download a prospectus, which is a common tactic for phishing or malware delivery. The PDF_SEO_LINK_FARM heuristic further indicates a large number of links, many hosted on Shopify, likely to obscure the malicious redirector.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wb?keyword=unisa%20postgraduate%20prospectus%202019%20pdf%20download
    • http://nowesula.prairieartscenter.org/uploads/1/3/0/7/130776023/6228746.pdf
    • http://rozatosef.riveroflifemedical.org/uploads/1/3/1/3/131384714/bozaweluw.pdf
    • http://nadiz.ayraibeauty.ca/uploads/1/3/1/4/131412032/373985.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/selegebid.pdf
    • https://cdn.shopify.com/s/files/1/0430/5970/8058/files/70278428549.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/rilab.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3639/files/31256492189.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/65446264189.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/brinjal_grafting.pdf
    • https://cdn.shopify.com/s/files/1/0441/2204/6616/files/joint_venture_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/14016073103.pdf
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/besas.pdf
    • https://cdn.shopify.com/s/files/1/0440/7567/9896/files/hippocampal_synaptic_plasticity_spatial_memory_and_anxiety.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tagesagebog.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000040c3.bin
7f84d34a380b1c2e573770d1fb0e265d999ded00fbe27a6f25bc9d270cb85be8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x40C3 5888 bytes
font_01_sfnt_off000054eb.bin
eeb89ec0b65d84fe04e5362935377224aa48cf2abfdcf5be1e0e258267bcc439		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54EB 9284 bytes

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